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UBC Theses and Dissertations
Tracking and recognizing actions of multiple hockey players using the boosted particle filter Lu, Wei-Lwun
Abstract
This thesis presents a system that can automatically track multiple hockey players and simultaneously recognize their actions given a single broadcast video sequence, where detection is complicated by a panning, tilting, and zooming camera. Firstly, we use the Histograms of Oriented Gradients (HOG) to represent the players, and introduce a probabilistic framework to model the appearance of the players by a mixture of local subspaces. We also employ an efficient offline learning algorithm to learn the templates from training data, and an efficient online filtering algorithm to update the templates used by the tracker. Secondly, we recognize the players' actions by incorporating the HOG descriptors with a pure multi-class sparse classifier with a robust motion similarity measure. Lastly, we augment the Boosted Particle Filter (BPF) with new observation model and template updater that improves the robustness of the tracking system. Experiments on long sequences show promising quantitative and qualitative results, and the system can run smoothly in near realtime.
Item Metadata
Title |
Tracking and recognizing actions of multiple hockey players using the boosted particle filter
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
2007
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Description |
This thesis presents a system that can automatically track multiple hockey players
and simultaneously recognize their actions given a single broadcast video sequence,
where detection is complicated by a panning, tilting, and zooming camera. Firstly,
we use the Histograms of Oriented Gradients (HOG) to represent the players, and
introduce a probabilistic framework to model the appearance of the players by a
mixture of local subspaces. We also employ an efficient offline learning algorithm
to learn the templates from training data, and an efficient online filtering algorithm
to update the templates used by the tracker. Secondly, we recognize the players'
actions by incorporating the HOG descriptors with a pure multi-class sparse classifier
with a robust motion similarity measure. Lastly, we augment the Boosted Particle
Filter (BPF) with new observation model and template updater that improves the
robustness of the tracking system. Experiments on long sequences show promising
quantitative and qualitative results, and the system can run smoothly in near realtime.
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Genre | |
Type | |
Language |
eng
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Date Available |
2011-02-28
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0052068
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.